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Chemical Research in Chinese Universities 2017年第3期33卷 415-421页

作者： ZHAO Yongsheng LI Qin ren hejun ZHOU Rui Key Laboratory of Groundwater Resources and Environment Ministry of Education College of Environment and Resources Jihn University Changehun 130021 P. R. China

Magnetic MnFe2O4-bentonite was synthesized by chemical co-precipitation method（CCM） and applied as catalyst in heterogeneous activation of persulfate（PS） to oxidize a target pollutant, 2,4-dichlorophenol（2,4-DCP）, in aqueous solutions. The surface morphology and structure of MnFe2On-bentonite were characterized by X-ray diffraction（XRD）, scanning electron microscope（SEM）, energy dispersive X-ray（EDX） and X-ray photoelectron spectroscopy（XPS） *** catalytic activity of MnFe2O4-bentonite for 2,4-DCP degradation was evaluated considering the effects of various process parameters, such as mass ratio of MnFe2O4 to bentonite, concentration of catalyst, PS concentration, and pH. The MnFe2O4-bentonite hybrid exhibited higher catalytic activity than pure MnFe2O4. Treatment with 5 g/L MnFe2O4-bentonite at 30℃ for 240 rain oxidized 92% of 100 mg/L 2,4-DCP（70.2% mineralization）, whereas treatment with pure MnFe2O4 under the same condition oxidized only 70% of the pollutant. This result indicate the erdlanced performance of the activated PS. Moreover, MnFe2O4-bentonite exhibits stable performance with minimal loss in activity after five successive runs. Thus, MnFe2O4-bentonite could be a promising catalyst in oxidative degradation of 2,4-DCE

关键词： 2,4-Dichlorophenol Advanced oxidation process Heterogeneous reaction MnFe2O4-bentonite Sulfate radical

Vc-Functionalized Fe3O4 Nanocomposites as Peroxidase-like Mimetics for H2O2 and Glucose Sensing

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Chemical Research in Chinese Universities 2018年第2期34卷 260-268页

作者： ren hejun MA Taigang ZHAO Jian ZHOU Rui Key Laboratory of Groundwater Resources and Environment Ministry of EducationCollege of Environment and Resources Jilin University Changchun 130021 P. R. China

A simple and efficient colorimetric biosensing for hydrogen peroxide and glucose with peroxidase-like vitamin C（Vc） functionalized Fe3O4 magnetic nanoparticles（Vc/Fe3O4MNPs） as a catalyst is reported. Compared with Fe3O4 MNPs and other catalysts, Vc/Fe3O4 MNPs exhibited superior catalytic properties. Kinetic studies indicated that vitamin C incorporated on Fe3O4 MNPs improved the affinity toward H2O2. As low as 0,29 μmol/L H2O2 can be detected with a wide linear range of 0.5-100 μmol/L H2O2; moreover, as low as 0.288 μmol/L glucose can be detected with a linear range of 0.5-25 μmol/L glucose. The detection method was highly sensitive in sensing H2O2 and glucose. The robustness of Vc/Fe3O4 MNPs rendered them suitable for wide ranging applications.

关键词： Vc/Fe3O4 Colorimetric biosensing Enzyme mimetics Hydrogen peroxide Glucose

Garlic Root Biomass as Novel Biosorbents for Malachite Green Removal： Parameter Optimization, Process Kinetics and Toxicity Test

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Chemical Research in Chinese Universities 2016年第4期32卷 647-654页

作者： ren hejun ZHANG Ruonan WANG Qiaochu PAN Hongyu WANG Yan Key Laboratory of Groundwater Resources and Environment Ministry of Education College of Environment and Resources Jilin University Changchun 130021 P. R. China College of Plant Sciences Jilin University Changchun 130062 P. R. China

The potential of the agricultural waste garlic root to remove malachite green（MG） from aqueous solutions was evaluated. The adsorption of this dye onto garlic root was confirmed by means of Fourier transform infrared analysis（FTIR） and scanning electron microscopy（SEM）. The equilibrium data fitted well into the Langmuir model（R2〉0.99）, and the adsorption kinetics followed the pseudo-second-order equation（R2〉0.99）. The maximum ad- sorption capacities of MG onto the adsorbent were 172.41 and 232.56 mg/g with the addition of 1 and 2 g/L garlic root, respectively. The optimal conditions for MG removal were established on the basis of orthogonal experiments（OAl6 matrix）. The concentrations of both MG and garlic root significantly affected the removal efficiency. The acute toxicity test indicated that the treated MG solutions were less toxic than the parent solutions. These results suggest that garlic root is a potential low-cost adsorbent for removing dye from industrial wastewater.

关键词： Garlic root Malachite green Adsorption Toxicity test Wastewater

Early identification of stroke through deep learning with multi-modal human speech and movement data

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Neural Regeneration Research 2025年第1期20卷 234-241页

作者： Zijun Ou Haitao Wang Bin Zhang Haobang Liang Bei Hu Longlong ren Yanjuan Liu Yuhu Zhang Chengbo Dai hejun Wu Weifeng Li Xin Li School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Neurology Guangdong Neuroscience InstituteGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Emergency Medicine Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina

Early identification and treatment of stroke can greatly improve patient outcomes and quality of *** clinical tests such as the Cincinnati Pre-hospital Stroke Scale(CPSS)and the Face Arm Speech Test(FAST)are commonly used for stroke screening,accurate administration is dependent on specialized *** this study,we proposed a novel multimodal deep learning approach,based on the FAST,for assessing suspected stroke patients exhibiting symptoms such as limb weakness,facial paresis,and speech disorders in acute *** collected a dataset comprising videos and audio recordings of emergency room patients performing designated limb movements,facial expressions,and speech tests based on the *** compared the constructed deep learning model,which was designed to process multi-modal datasets,with six prior models that achieved good action classification performance,including the I3D,SlowFast,X3D,TPN,TimeSformer,and *** found that the findings of our deep learning model had a higher clinical value compared with the other ***,the multi-modal model outperformed its single-module variants,highlighting the benefit of utilizing multiple types of patient data,such as action videos and speech *** results indicate that a multi-modal deep learning model combined with the FAST could greatly improve the accuracy and sensitivity of early stroke identification of stroke,thus providing a practical and powerful tool for assessing stroke patients in an emergency clinical setting.

关键词： artificial intelligence deep learning diagnosis early detection FAST screening stroke

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一株对硝基酚降解菌的筛选及其植物促生特性

科技导报 2016年第2期34卷 231-236页

作者：任何军王聪吉林大学环境与资源学院长春130061

从长期受对硝基酚(para-nitrophenol,PNP)污染的土壤中,分离到一株能够降解对硝基酚并以其作为唯一碳源和氮源生长的菌株,命名为PN-1。经16S r DNA序列分析,初步鉴定该菌株为假单胞菌(Pseudomona)。通过研究其对PNP的降解、重金属以及... 详细信息

从长期受对硝基酚(para-nitrophenol,PNP)污染的土壤中,分离到一株能够降解对硝基酚并以其作为唯一碳源和氮源生长的菌株,命名为PN-1。经16S r DNA序列分析,初步鉴定该菌株为假单胞菌(Pseudomona)。通过研究其对PNP的降解、重金属以及抗生素抗性、植物促生等特性,得到如下结果:该菌株对PNP的最大耐受质量浓度为200 mg/L,具有卡那霉素和氯霉素抗性,对4种重金属Cd2+、Pb2+、Zn2+和Cr6+的最低抑制浓度(minimum inhibitory concentration,MIC)分别为700、500、800和100 mg/L,同时具有产吲哚乙酸(IAA)和铁载体、1-氨基环丙烷-1-羧酸(ACC)脱氨酶活性以及溶磷能力。通过用荧光蛋白标记后能在土壤中正常存活,具有能与植物联合修复PNP污染土壤的潜力,有较好的使用前景。

关键词：对硝基酚重金属抗生素植物促生特性荧光蛋白标记

热活化过硫酸盐降解氧氟沙星特性及响应面优化

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吉林大学学报（地球科学版） 2021年第3期51卷 887-897页

作者：任何军林雯雯鲁松李婷婷周睿地下水资源与环境教育部重点实验室(吉林大学)/吉林大学新能源与环境学院长春130021

为了探究热活化过硫酸盐(PS)技术对水中氧氟沙星(OFX)的氧化降解作用,考察了反应温度、体系的初始pH、PS的初始浓度、OFX的初始浓度对OFX降解效果的影响;并在单因素实验的基础上,选取反应时间、体系的初始pH、PS的初始浓度和OFX的初始浓... 详细信息

为了探究热活化过硫酸盐(PS)技术对水中氧氟沙星(OFX)的氧化降解作用,考察了反应温度、体系的初始pH、PS的初始浓度、OFX的初始浓度对OFX降解效果的影响;并在单因素实验的基础上,选取反应时间、体系的初始pH、PS的初始浓度和OFX的初始浓度4个因素进行了响应面优化实验。结果表明:最佳降解条件为,反应温度60℃、PS初始浓度4.0 mmol/L、pH=4.7、OFX初始浓度0.03 mmol/L、反应时间60 min,此时OFX的降解率为81.29%;4个因素对热活化PS降解OFX均有影响,其影响显著性从大到小为反应时间、OFX的初始浓度、PS的初始浓度、初始pH。利用响应曲面法模拟出反应体系的最佳条件,经实验验证,OFX降解率为93.78%,与预测最佳结果95.00%基本相符,表明模型可靠有效。

关键词：氧氟沙星热活化过硫酸盐响应面优化

一株对硝基苯酚降解菌的筛选鉴定及其降解特性

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环境污染与防治 2013年第2期35卷 17-21页

作者：张清温玉娟任何军王显胜吉林大学环境与资源学院吉林长春130061

从受甲基对硫磷污染的土壤中分离筛选得到一株能够以对硝基苯酚(PNP)作为唯一碳源、氮源生长的菌株,命名为TM。经16SrDNA序列分析初步鉴定该菌株为节杆菌(Arthrobacter)。考察了该菌株在PNP浓度、盐度(NaCl)、pH、外加碳源(葡萄糖)、外... 详细信息

从受甲基对硫磷污染的土壤中分离筛选得到一株能够以对硝基苯酚(PNP)作为唯一碳源、氮源生长的菌株,命名为TM。经16SrDNA序列分析初步鉴定该菌株为节杆菌(Arthrobacter)。考察了该菌株在PNP浓度、盐度(NaCl)、pH、外加碳源(葡萄糖)、外加氮源等因素下对PNP降解特性的影响。结果表明:该菌株对PNP的最大耐受质量浓度为300mg/L,并在降解的过程中生成NO2-;该菌株的耐盐能力可达0.30%(质量分数),其最佳pH为8。在此pH下,200mg/L的PNP在16h时即可被完全降解,添加0.30%(质量分数)的葡萄糖可使生物量和降解速率达到最大,牛肉膏作为外加氮源最有利于该菌株对PNP的降解。

关键词：对硝基苯酚生物降解降解特性节杆菌

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不同龄渗滤液及其在包气带中的迁移转化研究

环境工程学报 2008年第9期2卷 1189-1193页

作者：周睿赵勇胜任何军花菲周红玲吉林大学环境与资源学院长春130026 吉林省兴环环境技术服务有限公司长春130021

通过实验室土柱模拟方法,研究了不同场龄渗滤液中有机污染物、氮以及Fe、Mn、Zn、Cd在包气带中的迁移转化规律。结果表明,不同场龄渗滤液理化性质差别很大,随着场龄的增加,COD从40 194 mg/L降低到1 778 mg/L,NH4+浓度从1 758 mg/L升高到... 详细信息

通过实验室土柱模拟方法,研究了不同场龄渗滤液中有机污染物、氮以及Fe、Mn、Zn、Cd在包气带中的迁移转化规律。结果表明,不同场龄渗滤液理化性质差别很大,随着场龄的增加,COD从40 194 mg/L降低到1 778 mg/L,NH4+浓度从1 758 mg/L升高到2 166 mg/L,金属浓度则减小。经过以细砂为介质的包气带后,新渗滤液易对地下水造成高浓度有机物污染,而老渗滤液更容易造成地下水的高浓度氮污染。Fe、Mn和Cd在包气带中比较稳定,而Zn的迁移能力很强,易对地下水构成威胁。

关键词：渗滤液场龄包气带有机物金属氮

Ore genesis of Badi copper deposit, northwest Yunnan Province, China： evidence from geology, fluid inclusions, and sulfur, hydrogen and oxygen isotopes

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Acta Geochimica 2018年第4期37卷 559-570页

作者： hejun Yin Jianguo Huang Tao ren Kunming University of Science and Technology Kunming 650093 China

The Badi copper deposit is located in Shangjiang town, Shangri-La County, Yunnan Province. Tectonically, it belongs to the Sanjiang Block. Vapor-liquid two-phase fluid inclusions, CO2-bearing fluid inclusions, and daugh- ter-beating inclusions were identified in sulfide-rich quartz veins. Microthermometric and Raman spectroscopy studies revealed their types of ore-forming fluids：（1） low-tem- perature, low-salinity fluid; （2） medium-temperature, low salinity CO2-bearing; and （3） high-temperature, Fe-rich, high sulfur fugacity. The δ^18O values of chalcopyrite- bearing quartz ranged from 4.96‰ to 5.86%0, with an average of 5.40%0. The δD values of ore-forming fluid in equilibrium with the sulfide-bearing quartz were from - 87‰ to - 107‰, with an average of - 97.86%0. These isotopic features indicate that the ore-forming fluid is a mixing fluid between magmatic fluid and meteoric water. The δ^34S values of chalcopyrite ranged from 13.3‰ to 15.5‰, with an average of 14.3‰. Sulfur isotope values suggest that the sulfur in the deposit most likely derived from seawater. Various fluid inclusions coexisted in the samples; similar homogenization temperature to different phases suggests that the Badi fluid inclusions might have been captured under a boiling system. Fluid boiling caused by fault activity could be the main reason for the mineral precipitation in the Badi deposit.

关键词： Badi copper deposit Fluid inclusion Sulfurisotope Hydrogen and oxygen isotope Ore genesis

Effect of nickel introduced by electroplating on pyrocarbon deposition of carbon-fiber preforms

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Chinese Journal of Aeronautics 2014年第4期27卷 1010-1014页

作者： ren Yancai Shi Xiaohong Li hejun Li Kezhi Zhang Xin Department of Material Science and Engineering Northwestern Polytechnical University

In order to improve the deposition rate and microstructure of pyrocarbon, nickel was introduced by electroplating on carbon fibers and used as a catalyst during the deposition of pyrocarbon at 1000 C using methane as a precursor gas. The distribution of nickel catalyst and the microstructure of pyrocarbon were characterized by scanning electron microscopy（SEM）, energy dispersive spectroscopy（EDS）, X-ray diffraction（XRD）, and Raman micro-spectrometry. Results show that nano-sized nickel particles could be well distributed on carbon fibers and the pyrocarbon deposited catalytically had a smaller d002 value and a higher graphitization degree compared with that without catalyst. In addition, the deposition rate of pyrocarbon in each hour was *** deposition rate of pyrocarbon in the first hour was more than 10 times when carbon cloth substrates were doped with nickel catalysts as compared to the pure carbon cloths. The pyrocarbon gained by rapid deposition may include two parts, which are generation directly on the nickel catalyst and formation with the carbon nanofibers as crystal nucleus.

关键词： Catalytic chemical vapor infiltration (CCVI) Electroplating Microstructure Nickel Pyrocarbon